Question:`(x^a/x^b)^(a + b)  xx (x^b/x^c)^(b + c)  xx (x^c/x^a)^((1)/(ca)) = ?` 

A 0 
B `x^1/(abc)` 
C `x^1/(ab + bc + ca)` 
D `1` 

+ Answer
D 

+ Explanation
Given Exp.`x^((a - b)/(ab)) . x^((b - c)/(ab)) . x^((c - a)/(ca))`

          `= x^(a^2 - b^2) + (b^2 - c^2) + (c^2 - a^2)`

         `= x^0 = 1.`

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Irin Moni

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